我创建了一个新的优惠券代码，它在前一天运行得很好。今天，我得到这个错误:处理您的请求时出错出于安全原因，默认情况下禁用异常打印。

a:5:{i:0;s:138:"无法发送报头;标题已经在app/code/community/Gala/Bigshopsettings/Helper/Data.php中发送，第1行";i:1;s:1718:"#0>lib/Zend/Controller/Response/Abstract.php(148): Zend_Controller_Response_Abstract->canSendHeaders(true)

1 app/code/core/Mage/core/Controller/Response/Http.php(107): Zend_Controller_Response_Abstract->setRedirect('http://www.capi…'，302)

2 app/code/core/Mage/core/Controller/Varien/Action.php(711): Mage_Core_Controller_Response_Http->setRedirect('http://www.capi…')

3 app/code/core/Mage/core/Controller/Varien/Action.php(689): Mage_Core_Controller_Varien_Action->setRedirectWithCookieCheck('checkout/cart'， Array)

4 app/code/core/Mage/Checkout/controllers/CartController.php(95): Mage_Core_Controller_Varien_Action->_redirect(' Checkout/cart')

5 app/code/core/Mage/Checkout/controllers/CartController.php(595): Mage_Checkout_CartController->_goBack()

6 app/code/core/Mage/core/Controller/Varien/Action.php(418): Mage_Checkout_CartController->couponPostAction()

7 app/code/core/Mage/core/Controller/Varien/Router/Standard.php(250): Mage_Core_Controller_Varien_Action->dispatch('couponPost')

8 app/code/core/Mage/core/Controller/Varien/Front.php(172): Mage_Core_Controller_Varien_Router_Standard->match(Object(Mage_Core_Controller_Request_Http))

9 app/code/core/Mage/core/Model/app .php(354): Mage_Core_Controller_Varien_Front->dispatch()

10 app/Mage.php(684): Mage_Core_Model_App->run(Array)

11 index.php(87): Mage::run("， 'store')

<标题> 12{主要}";销售:3:"url";销售:26:"/付款/车/couponPost/";销售:11:"script_name";销售:10:"/index . php";销售:4:"皮肤";销售:7:"违约";}

有什么建议吗?由于